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A comparative study of Hα-flares of different visual features in relation to radio bursts and sunspots

✍ Scribed by M. K. Das Gupta; T. K. Das; S. K. Sarkar

Publisher
Springer
Year
1979
Tongue
English
Weight
242 KB
Volume
64
Category
Article
ISSN
0038-0938

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✦ Synopsis

Solar Ha-flares now reported with their distinctive visual features have been statistically examined for a period of about eight years in relation to their different characteristics, flare-burst and flare-sunspot association. Important results obtained are: (i) Integrated intensity changes from the highest to the lowest values in the order F,/-/, E, and D flare type, whereas, impulsiveness in the order H, F, E, and D type. (ii) Flare-burst association is frequency dependent and is highest and lowest for H and D types respectively in almost all the frequencies. (iii) Most of the flares of D, E, and F types are associated with sunspots of/3p, %, and S configurations having field strength 1500-2500 G, while that of H type with/3p and r configurations having field strength 1000-2000 G.

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